Hi I am a student from Vancouver interested in studying at Oxford and just came from an info session, so here's what the recruiter told me:
- In regards to your first question, no there is no early admissions but considering the Oxford timeline the application deadline in October 15 which is similar to many US/CDN early admissions program anyways
- AP or IB is accepted with different requirements for both depending on the University and at Oxford, a provincial diploma is acceptable with their acceptance cutoff at 85% which is obviously not competitive. This is not true at Cambridge, a provincial diploma is not enough you need 40-41 in IB or 5 AP 5's. The recruiter mentioned that if you don't meet the full requirements of AP (so if your school offers some AP's but not a full catalog) submit your scores anyways and they won't hurt you and will only be seen as extra but she cautioned that you are expected to be taking the most difficult course load possible.
- I'm not sure but AP and IB are accepted by most UK universities
Another note that the recruiter mentioned specifically for medical applicants, the UK government mandates that all schools can only have 7% of their incoming medical students be international and at Oxford that works out to 7 exactly. She really could not stress enough how competitive these spots are as you are competing with 1000s of students from around the globe.
Disclaimer: Some of this may be wrong and/or Oxford-specific as I don't live in the UK and most of this information was found online (albeit at the university website) and from the aforementioned recruiter.
Hope this helps!